In the episode 'Asylum' (season 3, 3rd disc, episode 9) the beginning starts out with Clark visiting Lex in the asylum. Lex then says "I know your secret" and Clark looks up at the camera about 3 minutes later. But in the episode 'Memoria'(season 3,5th disc,episode 19) Clarks goes to talk to Lionel about Lex and Lionel shows Clark the video tape of Clark and Lex talking in the asylum. In the video tape Lex says "I know your secret, CLARK" and Clark QUICKLY looks at the camera.